$ git clone -n https://src.fedoraproject.org/rpms/gpaste.git /var/lib/mock/f39-build-1826794-41870/root/chroot_tmpdir/scmroot/gpaste
Cloning into '/var/lib/mock/f39-build-1826794-41870/root/chroot_tmpdir/scmroot/gpaste'...
$ git fetch origin db28714c7c79cd3437751b24c7b0ee50a9b35804:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gpaste
 * [new ref]         db28714c7c79cd3437751b24c7b0ee50a9b35804 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at db28714 Update to 45