$ git clone -n https://src.fedoraproject.org/rpms/ghc-wreq.git /var/lib/mock/f38-build-side-42-init-devel-1051473-29762/root/chroot_tmpdir/scmroot/ghc-wreq
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1051473-29762/root/chroot_tmpdir/scmroot/ghc-wreq'...
$ git fetch origin 68c30f07f2c1aabe501dafc105cd12a3f82a0787:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-wreq
 * [new ref]         68c30f07f2c1aabe501dafc105cd12a3f82a0787 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 68c30f0 Convert to %autorelease and %autochangelog