$ git clone -n https://src.fedoraproject.org/rpms/ghc-asn1-encoding.git /var/lib/mock/f38-build-side-42-init-devel-777552-27876/root/chroot_tmpdir/scmroot/ghc-asn1-encoding
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-777552-27876/root/chroot_tmpdir/scmroot/ghc-asn1-encoding'...
$ git fetch origin ab555f72898409df95afde27a520fab112f0ce2e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-asn1-encoding
 * [new ref]         ab555f72898409df95afde27a520fab112f0ce2e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ab555f7 Convert to %autorelease and %autochangelog