$ git clone -n https://src.fedoraproject.org/rpms/ghc-http-date.git /var/lib/mock/f41-build-839858-160377/root/chroot_tmpdir/scmroot/ghc-http-date
Cloning into '/var/lib/mock/f41-build-839858-160377/root/chroot_tmpdir/scmroot/ghc-http-date'...
$ git fetch origin 3c51959758848c1ba6c3d404fa0527734f56aa8c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-http-date
 * [new ref]         3c51959758848c1ba6c3d404fa0527734f56aa8c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3c51959 bump release