$ git clone -n https://src.fedoraproject.org/rpms/irda-utils.git /var/lib/mock/f45-build-14250-458/root/chroot_tmpdir/scmroot/irda-utils
Cloning into '/var/lib/mock/f45-build-14250-458/root/chroot_tmpdir/scmroot/irda-utils'...
$ git fetch origin b47851cec3575c62208908b82f52755ce24c2c0c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/irda-utils
 * [new ref]         b47851cec3575c62208908b82f52755ce24c2c0c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b47851c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild