$ git clone -n https://src.fedoraproject.org/rpms/gtkhash.git /var/lib/mock/f40-build-2236761-53519/root/chroot_tmpdir/scmroot/gtkhash
Cloning into '/var/lib/mock/f40-build-2236761-53519/root/chroot_tmpdir/scmroot/gtkhash'...
$ git fetch origin 4d2e39a8d49a77ca3d36d07f66f276f5e4583e73:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gtkhash
 * [new ref]         4d2e39a8d49a77ca3d36d07f66f276f5e4583e73 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4d2e39a Disable file manager extensions in flatpak builds