$ git clone -n https://src.fedoraproject.org/rpms/gala.git /var/lib/mock/f40-build-774286-127655/root/chroot_tmpdir/scmroot/gala
Cloning into '/var/lib/mock/f40-build-774286-127655/root/chroot_tmpdir/scmroot/gala'...
$ git fetch origin 6d1545c6405c721b669987f60103a2f109e400e0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gala
 * [new ref]         6d1545c6405c721b669987f60103a2f109e400e0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6d1545c Bump to commit 1550761 to add initial support for mutter 46.alpha