$ git clone -n https://src.fedoraproject.org/rpms/zegrapher.git /var/lib/mock/f45-build-39326-733/root/chroot_tmpdir/scmroot/zegrapher
Cloning into '/var/lib/mock/f45-build-39326-733/root/chroot_tmpdir/scmroot/zegrapher'...
$ git fetch origin 595a885af48333f8c3ceefe85c799775a38c2d27:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/zegrapher
 * [new ref]         595a885af48333f8c3ceefe85c799775a38c2d27 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 595a885 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild