$ git clone -n https://src.fedoraproject.org/rpms/notmuch.git /var/lib/mock/f38-build-side-42-init-devel-886905-28489/root/chroot_tmpdir/scmroot/notmuch
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-886905-28489/root/chroot_tmpdir/scmroot/notmuch'...
$ git fetch origin 58faa7e7e6c6517069a36bda90334ffca1809cf5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/notmuch
 * [new ref]         58faa7e7e6c6517069a36bda90334ffca1809cf5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 58faa7e Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild