$ git clone -n https://src.fedoraproject.org/rpms/wlroots0.18.git /var/lib/mock/f45-build-38436-724/root/chroot_tmpdir/scmroot/wlroots0.18
Cloning into '/var/lib/mock/f45-build-38436-724/root/chroot_tmpdir/scmroot/wlroots0.18'...
$ git fetch origin 28af6bd8b0582f71ce511d5b42eab29a699c51e4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/wlroots0.18
 * [new ref]         28af6bd8b0582f71ce511d5b42eab29a699c51e4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 28af6bd Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild