$ git clone -n https://src.fedoraproject.org/rpms/ghc-hxt-regex-xmlschema.git /var/lib/mock/f38-build-side-42-init-devel-975405-28931/root/chroot_tmpdir/scmroot/ghc-hxt-regex-xmlschema
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-975405-28931/root/chroot_tmpdir/scmroot/ghc-hxt-regex-xmlschema'...
$ git fetch origin a99a15147df56354e34ff9e14a37b13421a4f7ea:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-hxt-regex-xmlschema
 * [new ref]         a99a15147df56354e34ff9e14a37b13421a4f7ea -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a99a151 Convert to %autorelease and %autochangelog