$ git clone -n https://src.fedoraproject.org/rpms/ghc-regex-compat.git /var/lib/mock/f41-build-838895-159867/root/chroot_tmpdir/scmroot/ghc-regex-compat
Cloning into '/var/lib/mock/f41-build-838895-159867/root/chroot_tmpdir/scmroot/ghc-regex-compat'...
$ git fetch origin 5acad24abec7a6a15e52c77d97218ea7c133ec29:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-regex-compat
 * [new ref]         5acad24abec7a6a15e52c77d97218ea7c133ec29 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5acad24 bump release