$ git clone -n https://src.fedoraproject.org/rpms/ipcgull.git /var/lib/mock/f45-build-14196-457/root/chroot_tmpdir/scmroot/ipcgull
Cloning into '/var/lib/mock/f45-build-14196-457/root/chroot_tmpdir/scmroot/ipcgull'...
$ git fetch origin 578301ec9d4d900d20ee563a7380a568398d0b64:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ipcgull
 * [new ref]         578301ec9d4d900d20ee563a7380a568398d0b64 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 578301e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild