$ git clone -n https://src.fedoraproject.org/rpms/libical.git /var/lib/mock/f45-build-16319-485/root/chroot_tmpdir/scmroot/libical
Cloning into '/var/lib/mock/f45-build-16319-485/root/chroot_tmpdir/scmroot/libical'...
$ git fetch origin 2b5067eeef327dac1dc7fde0df915386f0dd2eca:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libical
 * [new ref]         2b5067eeef327dac1dc7fde0df915386f0dd2eca -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2b5067e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild