$ git clone -n https://src.fedoraproject.org/rpms/perl-Authen-SASL.git /var/lib/mock/eln-build-side-110880-59168453-6571457/root/chroot_tmpdir/scmroot/perl-Authen-SASL
Cloning into '/var/lib/mock/eln-build-side-110880-59168453-6571457/root/chroot_tmpdir/scmroot/perl-Authen-SASL'...
$ git fetch origin 99ddc258741e1746743bc68d7fd10349f27979cd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Authen-SASL
 * [new ref]         99ddc258741e1746743bc68d7fd10349f27979cd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 99ddc25 2.1800 bump (rhbz#2362350)