$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-Fixme.git /var/lib/mock/f45-build-26678-618/root/chroot_tmpdir/scmroot/perl-Test-Fixme
Cloning into '/var/lib/mock/f45-build-26678-618/root/chroot_tmpdir/scmroot/perl-Test-Fixme'...
$ git fetch origin 71b4073d1a44105ce0d846b026281b646f4e8ff7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-Fixme
 * [new ref]         71b4073d1a44105ce0d846b026281b646f4e8ff7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 71b4073 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild