$ git clone -n https://src.fedoraproject.org/rpms/libyuv.git /var/lib/mock/f45-build-17339-498/root/chroot_tmpdir/scmroot/libyuv
Cloning into '/var/lib/mock/f45-build-17339-498/root/chroot_tmpdir/scmroot/libyuv'...
$ git fetch origin 9132044b7400f247f9f7401ad21aaf64ace07e70:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libyuv
 * [new ref]         9132044b7400f247f9f7401ad21aaf64ace07e70 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9132044 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild