$ git clone -n https://src.fedoraproject.org/rpms/libgit2_1.6.git /var/lib/mock/f40-build-2294164-56254/root/chroot_tmpdir/scmroot/libgit2_1.6
Cloning into '/var/lib/mock/f40-build-2294164-56254/root/chroot_tmpdir/scmroot/libgit2_1.6'...
$ git fetch origin 4d97be16515f8b846a8ac1e64d5cd3c20cb52de5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libgit2_1.6
 * [new ref]         4d97be16515f8b846a8ac1e64d5cd3c20cb52de5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4d97be1 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild