$ git clone -n https://src.fedoraproject.org/rpms/delve.git /var/lib/mock/f39-build-1643031-40224/root/chroot_tmpdir/scmroot/delve
Cloning into '/var/lib/mock/f39-build-1643031-40224/root/chroot_tmpdir/scmroot/delve'...
$ git fetch origin 359f9e6301a3db556efb7b785acb81e5de7645a1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/delve
 * [new ref]         359f9e6301a3db556efb7b785acb81e5de7645a1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 359f9e6 Update to delve-1.21.0