$ git clone -n https://src.fedoraproject.org/rpms/ghc-hgettext.git /var/lib/mock/f38-build-side-42-init-devel-763819-27709/root/chroot_tmpdir/scmroot/ghc-hgettext
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-763819-27709/root/chroot_tmpdir/scmroot/ghc-hgettext'...
$ git fetch origin 057d403594b8ee8d9ef613dbe0a5a3055c8355c1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-hgettext
 * [new ref]         057d403594b8ee8d9ef613dbe0a5a3055c8355c1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 057d403 Convert to %autorelease and %autochangelog