$ git clone -n https://src.fedoraproject.org/rpms/ghc-HsYAML.git /var/lib/mock/f38-build-side-42-init-devel-1013147-29459/root/chroot_tmpdir/scmroot/ghc-HsYAML
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1013147-29459/root/chroot_tmpdir/scmroot/ghc-HsYAML'...
$ git fetch origin 1fa8a13142018af5d400af738d197cb811c13cb7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-HsYAML
 * [new ref]         1fa8a13142018af5d400af738d197cb811c13cb7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1fa8a13 Convert to %autorelease and %autochangelog