$ git clone -n https://src.fedoraproject.org/rpms/libxkbfile.git /var/lib/mock/f45-build-17337-498/root/chroot_tmpdir/scmroot/libxkbfile
Cloning into '/var/lib/mock/f45-build-17337-498/root/chroot_tmpdir/scmroot/libxkbfile'...
$ git fetch origin 81b3b98d4e63e84c1c190cd7b4c1416aca4206f6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libxkbfile
 * [new ref]         81b3b98d4e63e84c1c190cd7b4c1416aca4206f6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 81b3b98 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild