$ git clone -n https://src.fedoraproject.org/rpms/R-bslib.git /var/lib/mock/f38-build-side-42-init-devel-672204-26681/root/chroot_tmpdir/scmroot/R-bslib
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-672204-26681/root/chroot_tmpdir/scmroot/R-bslib'...
$ git fetch origin a29a633c84bcb48c68783866ce9c15b2ab1cd085:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-bslib
 * [new ref]         a29a633c84bcb48c68783866ce9c15b2ab1cd085 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a29a633 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild