$ git clone -n https://src.fedoraproject.org/rpms/python-hglib.git /var/lib/mock/f45-build-30956-648/root/chroot_tmpdir/scmroot/python-hglib
Cloning into '/var/lib/mock/f45-build-30956-648/root/chroot_tmpdir/scmroot/python-hglib'...
$ git fetch origin c5a5b657d1c8263847b2be25016e0da87ea06e0b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-hglib
 * [new ref]         c5a5b657d1c8263847b2be25016e0da87ea06e0b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c5a5b65 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild