$ git clone -n https://src.fedoraproject.org/rpms/wordgrinder.git /var/lib/mock/f45-build-38470-724/root/chroot_tmpdir/scmroot/wordgrinder
Cloning into '/var/lib/mock/f45-build-38470-724/root/chroot_tmpdir/scmroot/wordgrinder'...
$ git fetch origin 0a88b3cfdc8bf7857dfd34d4ca817e57e4023736:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/wordgrinder
 * [new ref]         0a88b3cfdc8bf7857dfd34d4ca817e57e4023736 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0a88b3c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild