$ git clone -n https://src.fedoraproject.org/rpms/perl-Crypt-SMIME.git /var/lib/mock/f43-perl-60959239-6586775/root/chroot_tmpdir/scmroot/perl-Crypt-SMIME
Cloning into '/var/lib/mock/f43-perl-60959239-6586775/root/chroot_tmpdir/scmroot/perl-Crypt-SMIME'...
$ git fetch origin 1a870aea757cacd6d32e3e9465db6cafd5176095:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Crypt-SMIME
 * [new ref]         1a870aea757cacd6d32e3e9465db6cafd5176095 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1a870ae Perl 5.42 rebuild