$ git clone -n https://src.fedoraproject.org/rpms/R-htmltools.git /var/lib/mock/f45-build-6281-347/root/chroot_tmpdir/scmroot/R-htmltools
Cloning into '/var/lib/mock/f45-build-6281-347/root/chroot_tmpdir/scmroot/R-htmltools'...
$ git fetch origin aa3fe628e35658d087ddfa9138358909fb616f35:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-htmltools
 * [new ref]         aa3fe628e35658d087ddfa9138358909fb616f35 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at aa3fe62 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild