$ git clone -n https://src.fedoraproject.org/rpms/abseil-cpp.git /var/lib/mock/f39-build-1931023-43110/root/chroot_tmpdir/scmroot/abseil-cpp
Cloning into '/var/lib/mock/f39-build-1931023-43110/root/chroot_tmpdir/scmroot/abseil-cpp'...
$ git fetch origin f51fdd9a79be150668909740f851088ca13dece0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/abseil-cpp
 * [new ref]         f51fdd9a79be150668909740f851088ca13dece0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f51fdd9 Update to 20230802.1 (close RHBZ#2239814)