$ git clone -n https://src.fedoraproject.org/rpms/libkrunfw.git /var/lib/mock/f45-build-16455-486/root/chroot_tmpdir/scmroot/libkrunfw
Cloning into '/var/lib/mock/f45-build-16455-486/root/chroot_tmpdir/scmroot/libkrunfw'...
$ git fetch origin 72dba934ab87f9db1ad50bb1045b5894e51d410f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libkrunfw
 * [new ref]         72dba934ab87f9db1ad50bb1045b5894e51d410f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 72dba93 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild