$ git clone -n https://src.fedoraproject.org/rpms/libnsl2.git /var/lib/mock/f45-build-16689-490/root/chroot_tmpdir/scmroot/libnsl2
Cloning into '/var/lib/mock/f45-build-16689-490/root/chroot_tmpdir/scmroot/libnsl2'...
$ git fetch origin d09a74c5b3d7017ad5aeaf7d7b9c67bd34a06de1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libnsl2
 * [new ref]         d09a74c5b3d7017ad5aeaf7d7b9c67bd34a06de1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d09a74c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild