$ git clone -n https://src.fedoraproject.org/rpms/watchdog.git /var/lib/mock/f45-build-38241-722/root/chroot_tmpdir/scmroot/watchdog
Cloning into '/var/lib/mock/f45-build-38241-722/root/chroot_tmpdir/scmroot/watchdog'...
$ git fetch origin 4d56d83cb87189f9bebe623eb2f0a815380ac337:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/watchdog
 * [new ref]         4d56d83cb87189f9bebe623eb2f0a815380ac337 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4d56d83 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild