$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-TinyMocker.git /var/lib/mock/f45-build-26911-620/root/chroot_tmpdir/scmroot/perl-Test-TinyMocker
Cloning into '/var/lib/mock/f45-build-26911-620/root/chroot_tmpdir/scmroot/perl-Test-TinyMocker'...
$ git fetch origin c8622bb278c4e0ef8fbb55505497e7c80e572e15:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-TinyMocker
 * [new ref]         c8622bb278c4e0ef8fbb55505497e7c80e572e15 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c8622bb Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild