$ git clone -n https://src.fedoraproject.org/rpms/gtksourceviewmm3.git /var/lib/mock/f39-build-1470149-33881/root/chroot_tmpdir/scmroot/gtksourceviewmm3
Cloning into '/var/lib/mock/f39-build-1470149-33881/root/chroot_tmpdir/scmroot/gtksourceviewmm3'...
$ git fetch origin a90a8343fc0f0d59c461c75cd38679c7c2d07daf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gtksourceviewmm3
 * [new ref]         a90a8343fc0f0d59c461c75cd38679c7c2d07daf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a90a834 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild