$ git clone -n https://src.fedoraproject.org/rpms/upower.git /var/lib/mock/f39-build-1551553-36979/root/chroot_tmpdir/scmroot/upower
Cloning into '/var/lib/mock/f39-build-1551553-36979/root/chroot_tmpdir/scmroot/upower'...
$ git fetch origin ef8cbd3e58d9dcb2bfd098899dc134b81f3b9dab:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/upower
 * [new ref]         ef8cbd3e58d9dcb2bfd098899dc134b81f3b9dab -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ef8cbd3 Rebuilt for libimobiledevice and libplist soname bump