$ git clone -n https://src.fedoraproject.org/rpms/golang-github-marekm4-color-extractor.git /var/lib/mock/f40-build-2198822-51710/root/chroot_tmpdir/scmroot/golang-github-marekm4-color-extractor
Cloning into '/var/lib/mock/f40-build-2198822-51710/root/chroot_tmpdir/scmroot/golang-github-marekm4-color-extractor'...
$ git fetch origin 3bea964d2f4cbeaf32bb14b7fb30bf91ca4682b9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-marekm4-color-extractor
 * [new ref]         3bea964d2f4cbeaf32bb14b7fb30bf91ca4682b9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3bea964 Update to 1.2.1