$ git clone -n https://src.fedoraproject.org/rpms/R-munsell.git /var/lib/mock/f45-build-6280-347/root/chroot_tmpdir/scmroot/R-munsell
Cloning into '/var/lib/mock/f45-build-6280-347/root/chroot_tmpdir/scmroot/R-munsell'...
$ git fetch origin 659bc6d9617ab28c4b613df18fde6478b535c81a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-munsell
 * [new ref]         659bc6d9617ab28c4b613df18fde6478b535c81a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 659bc6d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild