$ git clone -n https://src.fedoraproject.org/rpms/rust-x509-parser.git /var/lib/mock/f45-build-46255-832/root/chroot_tmpdir/scmroot/rust-x509-parser
Cloning into '/var/lib/mock/f45-build-46255-832/root/chroot_tmpdir/scmroot/rust-x509-parser'...
$ git fetch origin 3b51784ddc960d092da134a658013d9dad9e4fc1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-x509-parser
 * [new ref]         3b51784ddc960d092da134a658013d9dad9e4fc1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3b51784 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild