$ git clone -n https://src.fedoraproject.org/rpms/hdhomerun.git /var/lib/mock/f45-build-13382-450/root/chroot_tmpdir/scmroot/hdhomerun
Cloning into '/var/lib/mock/f45-build-13382-450/root/chroot_tmpdir/scmroot/hdhomerun'...
$ git fetch origin 1522a793948beb768293d89fca6ef1ee5504a1db:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/hdhomerun
 * [new ref]         1522a793948beb768293d89fca6ef1ee5504a1db -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1522a79 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild