$ git clone -n https://src.fedoraproject.org/rpms/ghc-HaXml.git /var/lib/mock/f38-build-side-42-init-devel-851496-28425/root/chroot_tmpdir/scmroot/ghc-HaXml
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-851496-28425/root/chroot_tmpdir/scmroot/ghc-HaXml'...
$ git fetch origin a5bc2a0c0b6d2664f4adc2d452095158986c3859:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-HaXml
 * [new ref]         a5bc2a0c0b6d2664f4adc2d452095158986c3859 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a5bc2a0 Convert to %autorelease and %autochangelog