$ git clone -n https://src.fedoraproject.org/rpms/golang-github-ianlancetaylor-demangle.git /var/lib/mock/f39-build-1442499-32469/root/chroot_tmpdir/scmroot/golang-github-ianlancetaylor-demangle
Cloning into '/var/lib/mock/f39-build-1442499-32469/root/chroot_tmpdir/scmroot/golang-github-ianlancetaylor-demangle'...
$ git fetch origin 3ab7e29ec28eddcf2e2c545969ff01bff7d8b17d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-ianlancetaylor-demangle
 * [new ref]         3ab7e29ec28eddcf2e2c545969ff01bff7d8b17d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3ab7e29 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild