$ git clone -n https://src.fedoraproject.org/rpms/perl-Array-Base.git /var/lib/mock/f43-perl-60959488-6586778/root/chroot_tmpdir/scmroot/perl-Array-Base
Cloning into '/var/lib/mock/f43-perl-60959488-6586778/root/chroot_tmpdir/scmroot/perl-Array-Base'...
$ git fetch origin 92ce3f9fa9602931ace2255cbae612b120545741:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Array-Base
 * [new ref]         92ce3f9fa9602931ace2255cbae612b120545741 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 92ce3f9 Perl 5.42 rebuild