$ git clone -n https://src.fedoraproject.org/rpms/chipmunk.git /var/lib/mock/f45-build-5541-340/root/chroot_tmpdir/scmroot/chipmunk
Cloning into '/var/lib/mock/f45-build-5541-340/root/chroot_tmpdir/scmroot/chipmunk'...
$ git fetch origin 8368d5439ded6020f6ac7028697c5ed4284aadf2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/chipmunk
 * [new ref]         8368d5439ded6020f6ac7028697c5ed4284aadf2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8368d54 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild