$ git clone -n https://src.fedoraproject.org/rpms/cohomCalg.git /var/lib/mock/f45-build-4560-332/root/chroot_tmpdir/scmroot/cohomCalg
Cloning into '/var/lib/mock/f45-build-4560-332/root/chroot_tmpdir/scmroot/cohomCalg'...
$ git fetch origin b64b28789ca30d433136f24c01130b5f1f2b3a7f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cohomCalg
 * [new ref]         b64b28789ca30d433136f24c01130b5f1f2b3a7f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b64b287 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild