$ git clone -n https://src.fedoraproject.org/rpms/colorful.git /var/lib/mock/f40-build-1945598-25181/root/chroot_tmpdir/scmroot/colorful
Cloning into '/var/lib/mock/f40-build-1945598-25181/root/chroot_tmpdir/scmroot/colorful'...
$ git fetch origin 93ae4e1378d1cc22390c3ff984a2fa650bbee324:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/colorful
 * [new ref]         93ae4e1378d1cc22390c3ff984a2fa650bbee324 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 93ae4e1 Update to v2.1