$ git clone -n https://src.fedoraproject.org/rpms/perl-POE.git /var/lib/mock/f45-build-25506-611/root/chroot_tmpdir/scmroot/perl-POE
Cloning into '/var/lib/mock/f45-build-25506-611/root/chroot_tmpdir/scmroot/perl-POE'...
$ git fetch origin 81e930a6bcf919a19e39dd0f62745b05db02b310:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-POE
 * [new ref]         81e930a6bcf919a19e39dd0f62745b05db02b310 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 81e930a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild