$ git clone -n https://src.fedoraproject.org/rpms/ghc-asn1-parse.git /var/lib/mock/f39-build-2230159-53213/root/chroot_tmpdir/scmroot/ghc-asn1-parse
Cloning into '/var/lib/mock/f39-build-2230159-53213/root/chroot_tmpdir/scmroot/ghc-asn1-parse'...
$ git fetch origin df2f6f0a94d198f9fbf345d7b739e8d1a515268c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-asn1-parse
 * [new ref]         df2f6f0a94d198f9fbf345d7b739e8d1a515268c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at df2f6f0 bump release