$ git clone -n https://src.fedoraproject.org/rpms/dSFMT.git /var/lib/mock/f45-build-7221-361/root/chroot_tmpdir/scmroot/dSFMT
Cloning into '/var/lib/mock/f45-build-7221-361/root/chroot_tmpdir/scmroot/dSFMT'...
$ git fetch origin 769489efef6cfa6930b7a0690d231dafb655ff54:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dSFMT
 * [new ref]         769489efef6cfa6930b7a0690d231dafb655ff54 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 769489e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild