$ git clone -n https://src.fedoraproject.org/rpms/golang-github-facebookgo-clock.git /var/lib/mock/f40-build-2000326-44450/root/chroot_tmpdir/scmroot/golang-github-facebookgo-clock
Cloning into '/var/lib/mock/f40-build-2000326-44450/root/chroot_tmpdir/scmroot/golang-github-facebookgo-clock'...
$ git fetch origin 0a0bb08334702f6148c2d2f12eb811d59e632b21:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-facebookgo-clock
 * [new ref]         0a0bb08334702f6148c2d2f12eb811d59e632b21 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0a0bb08 Disable tests