$ git clone -n https://src.fedoraproject.org/rpms/mkdocs.git /var/lib/mock/f42-build-3272219-41305/root/chroot_tmpdir/scmroot/mkdocs
Cloning into '/var/lib/mock/f42-build-3272219-41305/root/chroot_tmpdir/scmroot/mkdocs'...
$ git fetch origin b09706e0fd0cf61a13ac6c4dde48625bb42edf17:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mkdocs
 * [new ref]         b09706e0fd0cf61a13ac6c4dde48625bb42edf17 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b09706e Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild