$ git clone -n https://src.fedoraproject.org/rpms/gnat-srpm-macros.git /var/lib/mock/f42-build-3275121-41320/root/chroot_tmpdir/scmroot/gnat-srpm-macros
Cloning into '/var/lib/mock/f42-build-3275121-41320/root/chroot_tmpdir/scmroot/gnat-srpm-macros'...
$ git fetch origin 001f4b32f94e07496e20502b1bde779294b19c1d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnat-srpm-macros
 * [new ref]         001f4b32f94e07496e20502b1bde779294b19c1d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 001f4b3 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild