$ git clone -n https://src.fedoraproject.org/rpms/ghc-lrucache.git /var/lib/mock/f41-build-838883-159867/root/chroot_tmpdir/scmroot/ghc-lrucache
Cloning into '/var/lib/mock/f41-build-838883-159867/root/chroot_tmpdir/scmroot/ghc-lrucache'...
$ git fetch origin 42c1266ba0666acb1755644d30d1eac0f66247b5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-lrucache
 * [new ref]         42c1266ba0666acb1755644d30d1eac0f66247b5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 42c1266 bump release