$ git clone -n https://src.fedoraproject.org/rpms/golang-x-mobile.git /var/lib/mock/f38-build-side-42-init-devel-990642-29114/root/chroot_tmpdir/scmroot/golang-x-mobile
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-990642-29114/root/chroot_tmpdir/scmroot/golang-x-mobile'...
$ git fetch origin f00ef3d8eedd8d7baf5d8d6b5b2eb3254c648f7c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-x-mobile
 * [new ref]         f00ef3d8eedd8d7baf5d8d6b5b2eb3254c648f7c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f00ef3d Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild