$ git clone -n https://src.fedoraproject.org/rpms/libuv.git /var/lib/mock/f45-build-17197-497/root/chroot_tmpdir/scmroot/libuv
Cloning into '/var/lib/mock/f45-build-17197-497/root/chroot_tmpdir/scmroot/libuv'...
$ git fetch origin a17f04ba152d9f1a8e4f1acefe27c019483ad1c0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libuv
 * [new ref]         a17f04ba152d9f1a8e4f1acefe27c019483ad1c0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a17f04b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild