$ git clone -n https://src.fedoraproject.org/rpms/roctracer.git /var/lib/mock/f45-build-54742-937/root/chroot_tmpdir/scmroot/roctracer
Cloning into '/var/lib/mock/f45-build-54742-937/root/chroot_tmpdir/scmroot/roctracer'...
$ git fetch origin 785f7da76065b6e463854128c0352366a2a68ac5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/roctracer
 * [new ref]         785f7da76065b6e463854128c0352366a2a68ac5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 785f7da Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild