$ git clone -n https://src.fedoraproject.org/rpms/rust-rgb.git /var/lib/mock/f40-build-2039192-48248/root/chroot_tmpdir/scmroot/rust-rgb
Cloning into '/var/lib/mock/f40-build-2039192-48248/root/chroot_tmpdir/scmroot/rust-rgb'...
$ git fetch origin 17a33dcfc708acfe700acc41748fd574f6e95f6f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rgb
 * [new ref]         17a33dcfc708acfe700acc41748fd574f6e95f6f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 17a33dc Update to version 0.8.37; Fixes RHBZ#2246828