$ git clone -n https://src.fedoraproject.org/rpms/perl-Tie-IxHash.git /var/lib/mock/f45-build-27209-621/root/chroot_tmpdir/scmroot/perl-Tie-IxHash
Cloning into '/var/lib/mock/f45-build-27209-621/root/chroot_tmpdir/scmroot/perl-Tie-IxHash'...
$ git fetch origin 4c5f42d742704a26c010d8bdd1fcc0e0f09b6842:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Tie-IxHash
 * [new ref]         4c5f42d742704a26c010d8bdd1fcc0e0f09b6842 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4c5f42d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild