$ git clone -n https://src.fedoraproject.org/rpms/miniz.git /var/lib/mock/f45-build-18900-534/root/chroot_tmpdir/scmroot/miniz
Cloning into '/var/lib/mock/f45-build-18900-534/root/chroot_tmpdir/scmroot/miniz'...
$ git fetch origin 478c086dc6a497985f1765f9b850038e6fb1ace9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/miniz
 * [new ref]         478c086dc6a497985f1765f9b850038e6fb1ace9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 478c086 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild