$ git clone -n https://src.fedoraproject.org/rpms/ghc-hs-bibutils.git /var/lib/mock/f38-build-side-42-init-devel-727343-27333/root/chroot_tmpdir/scmroot/ghc-hs-bibutils
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-727343-27333/root/chroot_tmpdir/scmroot/ghc-hs-bibutils'...
$ git fetch origin 3b737097456882b2fc8e4c9593e3eed1878d8495:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-hs-bibutils
 * [new ref]         3b737097456882b2fc8e4c9593e3eed1878d8495 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3b73709 Convert to %autorelease and %autochangelog