$ git clone -n https://src.fedoraproject.org/rpms/jakarta-servlet.git /var/lib/mock/f38-build-side-42-init-devel-580617-26031/root/chroot_tmpdir/scmroot/jakarta-servlet
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-580617-26031/root/chroot_tmpdir/scmroot/jakarta-servlet'...
$ git fetch origin cf6e2840f8d001f5d4f1830f7d8ca9cac617575e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jakarta-servlet
 * [new ref]         cf6e2840f8d001f5d4f1830f7d8ca9cac617575e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cf6e284 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild