$ git clone -n https://src.fedoraproject.org/rpms/openarm-can.git /var/lib/mock/f45-build-20976-576/root/chroot_tmpdir/scmroot/openarm-can
Cloning into '/var/lib/mock/f45-build-20976-576/root/chroot_tmpdir/scmroot/openarm-can'...
$ git fetch origin 53b7ed15eaa7cf2585bd1df7f30adf13a5895c47:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/openarm-can
 * [new ref]         53b7ed15eaa7cf2585bd1df7f30adf13a5895c47 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 53b7ed1 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild