$ git clone -n https://src.fedoraproject.org/rpms/R-keyring.git /var/lib/mock/f38-build-side-42-init-devel-769647-27754/root/chroot_tmpdir/scmroot/R-keyring
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-769647-27754/root/chroot_tmpdir/scmroot/R-keyring'...
$ git fetch origin b62809a7715b042d3f0748045e49878aad23d238:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-keyring
 * [new ref]         b62809a7715b042d3f0748045e49878aad23d238 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b62809a Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild