$ git clone -n https://src.fedoraproject.org/rpms/msktutil.git /var/lib/mock/f45-build-19254-545/root/chroot_tmpdir/scmroot/msktutil
Cloning into '/var/lib/mock/f45-build-19254-545/root/chroot_tmpdir/scmroot/msktutil'...
$ git fetch origin 3007e3e4b853f4f5fcf39702d77090dc000dbce1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/msktutil
 * [new ref]         3007e3e4b853f4f5fcf39702d77090dc000dbce1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3007e3e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild