$ git clone -n https://src.fedoraproject.org/rpms/python-databases.git /var/lib/mock/f39-build-1959737-43267/root/chroot_tmpdir/scmroot/python-databases
Cloning into '/var/lib/mock/f39-build-1959737-43267/root/chroot_tmpdir/scmroot/python-databases'...
$ git fetch origin f61de2ecc9293792b289b00e6893feb30a5d7450:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-databases
 * [new ref]         f61de2ecc9293792b289b00e6893feb30a5d7450 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f61de2e Update to 0.8.0 (close RHBZ#2235410)