$ git clone -n https://src.fedoraproject.org/rpms/drumstick.git /var/lib/mock/f40-build-774272-127655/root/chroot_tmpdir/scmroot/drumstick
Cloning into '/var/lib/mock/f40-build-774272-127655/root/chroot_tmpdir/scmroot/drumstick'...
$ git fetch origin 0043ed37099c72b6c0afdf547cdd32a7a5003a3d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/drumstick
 * [new ref]         0043ed37099c72b6c0afdf547cdd32a7a5003a3d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0043ed3 New release 2.9.0 (RHBZ#2255730)