$ git clone -n https://src.fedoraproject.org/rpms/linbox.git /var/lib/mock/f38-build-side-42-init-devel-766279-27730/root/chroot_tmpdir/scmroot/linbox
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-766279-27730/root/chroot_tmpdir/scmroot/linbox'...
$ git fetch origin e31082dae115b7539a2aa6a6fafef24ce4fe7e62:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/linbox
 * [new ref]         e31082dae115b7539a2aa6a6fafef24ce4fe7e62 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e31082d Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild