$ git clone -n https://src.fedoraproject.org/rpms/ghc-regex-compat.git /var/lib/mock/f40-build-776466-128863/root/chroot_tmpdir/scmroot/ghc-regex-compat
Cloning into '/var/lib/mock/f40-build-776466-128863/root/chroot_tmpdir/scmroot/ghc-regex-compat'...
$ git fetch origin be4740559dd3a69413ec4a62d6113d13ab11b3f8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-regex-compat
 * [new ref]         be4740559dd3a69413ec4a62d6113d13ab11b3f8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at be47405 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild