$ git clone -n https://src.fedoraproject.org/rpms/rust-gix-credentials.git /var/lib/mock/f38-build-side-43-rust-devel-1416676-31457/root/chroot_tmpdir/scmroot/rust-gix-credentials
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1416676-31457/root/chroot_tmpdir/scmroot/rust-gix-credentials'...
$ git fetch origin c1f56e51d21fbcbe3eefd42fa7638403305bd8eb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gix-credentials
 * [new ref]         c1f56e51d21fbcbe3eefd42fa7638403305bd8eb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c1f56e5 Update to version 0.21.0