$ git clone -n https://src.fedoraproject.org/rpms/libsavitar.git /var/lib/mock/f39-build-2032682-47720/root/chroot_tmpdir/scmroot/libsavitar
Cloning into '/var/lib/mock/f39-build-2032682-47720/root/chroot_tmpdir/scmroot/libsavitar'...
$ git fetch origin 924468d0817735645f879548503c8dc2e8dca3e0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libsavitar
 * [new ref]         924468d0817735645f879548503c8dc2e8dca3e0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 924468d Update to 5.3.0