$ git clone -n https://src.fedoraproject.org/rpms/ghc-mockery.git /var/lib/mock/f38-build-side-42-init-devel-1007514-29378/root/chroot_tmpdir/scmroot/ghc-mockery
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1007514-29378/root/chroot_tmpdir/scmroot/ghc-mockery'...
$ git fetch origin c5736bf32ed10d25a873485c822416fda4e8c58b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-mockery
 * [new ref]         c5736bf32ed10d25a873485c822416fda4e8c58b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c5736bf Convert to %autorelease and %autochangelog